Sliver Grid
- snippet.dart
new SliverGrid( gridDelegate: SliverGridDelegateWithFixedCrossAxisCount( crossAxisCount: orientation == Orientation.portrait ? 2 : 3, childAspectRatio: 0.86, ), delegate: SliverChildBuilderDelegate( (context, index) { return ItemList(context, items: itemList[index]); }, childCount: itemList.length, ), ),